package cn.wolfcode.wolf2w.service.impl;

import cn.wolfcode.wolf2w.domain.Destination;
import cn.wolfcode.wolf2w.domain.Strategy;
import cn.wolfcode.wolf2w.domain.Travel;
import cn.wolfcode.wolf2w.exception.LogicException;
import cn.wolfcode.wolf2w.query.TravelCondition;
import cn.wolfcode.wolf2w.query.TravelQuery;
import cn.wolfcode.wolf2w.repository.TravelRepository;
import cn.wolfcode.wolf2w.service.IDestinationService;
import cn.wolfcode.wolf2w.service.ITravelService;
import cn.wolfcode.wolf2w.service.IUserInfoService;
import cn.wolfcode.wolf2w.util.DBHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Date;
import java.util.List;

@Service
//@Transactional mongodb事务必须复制集方式
public class TravelServiceImpl implements ITravelService {

    @Autowired
    private TravelRepository repository;

    @Autowired
    private MongoTemplate template;

    @Autowired
    private IUserInfoService userInfoService;

    @Autowired
    private IDestinationService destinationService;


    @Override
    public void save(Travel Travel) {
        Travel.setId(null);//如果id为null，spring-data-mongodb不会将自动生成的id注入
        repository.save(Travel);
    }

    @Override
    public void update(Travel Travel) {
        repository.save(Travel);
    }

    @Override
    public void delete(String id) {
        repository.deleteById(id);
    }

    @Override
    public Travel get(String id) {
        Travel travel = repository.findById(id).orElse(null);
        //避免空指针异常  判空
        if(travel != null){//游记存在
            travel.setAuthor(userInfoService.get(travel.getUserId()));
            //防止目的地id为null
            travel.setDest(destinationService.get(travel.getDestId()));
        }

        return travel;
    }

    @Override
    public List<Travel> list() {
        return repository.findAll();
    }

    @Override
    public Page<Travel> query(TravelQuery qo) {
        Query query = new Query();

        if(StringUtils.hasLength(qo.getDestId())){
            query.addCriteria(Criteria.where("destId").is(qo.getDestId()));
        }


        //出查询天数
        //TravelCondition day=TravelCondition.DAY_MAP.get(qo.getDayType());
        TravelCondition day = qo.getDay();

        if(day != null){
            //gte大于等于  lte小于等于
            query.addCriteria(Criteria.where("day").gte(day.getMin()).lte(day.getMax()));
        }
        //消费
        TravelCondition ex = qo.getPerExpend();
        if(ex != null){
            query.addCriteria(Criteria.where("perExpend").gte(ex.getMin()).lte(ex.getMax()));
        }
        //排序
        Pageable pageable = null;
        if (qo.getOrderType() == 1){
            pageable = PageRequest.of(qo.getCurrentPage() - 1, qo.getPageSize(),
                    Sort.Direction.DESC, "createTime");
        }else if(qo.getOrderType() == 2){
            pageable = PageRequest.of(qo.getCurrentPage() - 1, qo.getPageSize(),
                    Sort.Direction.DESC, "viewnum");
        }else {
            pageable = PageRequest.of(qo.getCurrentPage() - 1, qo.getPageSize(),
                    Sort.Direction.ASC, "_id");
        }

        Page<Travel> page = DBHelper.query(template, Travel.class, query, pageable);
        //页面确实用户对象[维护用户对象]
        for (Travel travel : page) {
            travel.setAuthor(userInfoService.get(travel.getUserId()));
        }
        return page;
    }

    @Override
    public void saveOrUpdate(Travel travel) {
        //目的地名称
        Destination dest = destinationService.get(travel.getDestId());
        travel.setDestName(dest.getName());

        //用户id, 表现成controller设置了
        //最后更新时间
        travel.setLastUpdateTime(new Date());
        if(StringUtils.hasLength(travel.getId())){
            this.update(travel);
        }else{
            //创建时间
            travel.setCreateTime(new Date());
            this.save(travel);
        }
    }

    @Override
    public void audit(String id, int state) {
        //思考审核流程
        //判断是否满足审核条件
        Travel travel = this.get(id);
        if(travel == null){
            throw new LogicException("参数异常");
        }
        if(travel.getState() != Travel.STATE_WAITING){
            throw new LogicException("游记不是待审核状态, 不允许审核");
        }

        if(state == Travel.STATE_RELEASE){
            //审核通过之后需要做什么
            //1:修改状态为审核通过状态
            travel.setState(Travel.STATE_RELEASE);
            //2:修改发布时间
            travel.setReleaseTime(new Date());
            //3:最后更新时间
            travel.setLastUpdateTime(new Date());
            //4:记录审核信息(审核人, 审核时间,审核状态,审核备注...)

            this.update(travel);
        }else if (state == Travel.STATE_REJECT){
            //审核拒绝之后要做什么
            //1:修改状态为审核通过状态
            travel.setState(Travel.STATE_REJECT);
            //2:修改发布时间(为null)
            travel.setReleaseTime(null);
            //3:最后更新时间
            travel.setLastUpdateTime(new Date());
            //4:记录审核信息(审核人, 审核时间,审核状态,审核备注...)

            this.update(travel);
        }else{
            throw new LogicException("状态不对");
        }
    }

    @Override
    public List<Travel> queryViewnumTop3(String destId) {
        //1:目的地id必须指定
        //2:点击量倒序
        //3:截取前面3个
        Pageable pageable = PageRequest.of(0, 3,
                Sort.Direction.DESC, "viewnum");
        List<Travel> list = repository.findByDestId(destId,pageable);
        return list;
    }

    @Override
    public List<Travel> queryByDestName(String destName) {
        List<Travel> travels = repository.findByDestName(destName);
        for (Travel travel : travels) {
            travel.setAuthor(userInfoService.get(travel.getUserId()));
            travel.setDest(destinationService.get(travel.getDestId()));
        }
        return travels;
    }

    //修改状态
    @Override
    public void changeState(String id, int state) {
        Query query  = new Query();
        query.addCriteria(Criteria.where("_id").is(id)); //where
        Update update = new Update();  //$set
        update.set("state", state); // state = 1
        template.updateMulti(query, update, Strategy.class);
    }
}
